Moreover, newly introduced targeted drugs for lymphoma, such as idelalisib [25], ibrutinib [26], anti-CD30 monoclonal antibody [27], and anti-PD1 monoclonal antibody [28], have been shown to be associated with drug-induced pneumonitis, making it more difficult to identify risk factors for IP. Here, TNFRSF8 is linked to incontinentia pigmenti.